i was driving along today when all of a sudden there was an undescribable noise in my dash. It was some sort of buzzing. I hit it a few times, reset my trip meter, and it went away about 5 minutes later. It was the most irritating noise ever.... anyone know what it is or how i can fix it in the future?

You prob have a peice loose in the dash or a screw loose.
If its the center dash with the CD player etc then just take out the screws and pop it off to see if anything is loose or rubbing up against something.
Its prob just something loose. Its just a point of getting in there and checking it out.

Check the speedometer cable. It is probally resonating out of the tranny.